oil change and oil breather confusion. help!!

5 replies to this topic
  • wr450eff

Posted December 09, 2010 - 03:42 PM


hi, i've just finished doing an oil and filter change on my '04 wr 450 f and i noticed, after the oil change, that theres a breather coming off the top of the rocker cover which is blowing air out. is this normal? i only noticed because i had my bash plate off so it might of always done it. thanks for looking guys! :thumbsup:

  • dgcars

Posted December 09, 2010 - 03:55 PM


Just the vent hose for the crankcases. As long as its air - its normal

  • wr450eff

Posted December 09, 2010 - 04:21 PM


yeah it is just air coming out. also what happens if i go through a puddle higher than the end of the pipe? will any water get sucked up? many thanks.

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  • dgcars

Posted December 09, 2010 - 04:34 PM


During normal running the breather should blow but it will suck while starting. If you are going to be doing a lot of deep water riding, then route the pipe up & into the airbox. You can add a filter or catch tank to the end, to stop your airbox/filter gettin' messed up.

  • wr450eff

Posted December 09, 2010 - 04:43 PM


good idea! i'll do that tomorrow night. what kind of filter? i was thinking of an universal in line fuel filter for a car... would that be alright? thanks for your help and advice. :thumbsup:

  • dgcars

Posted December 09, 2010 - 04:48 PM


As long as you can clean it....whatever :thumbsup:


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